Effect of laser pulse energies in laser induced breakdown spectroscopy in double-pulse configuration

被引：123

作者：

Benedetti, PA ^{[1
]}

Cristoforetti, G ^{[1
]}

Legnaioli, S ^{[1
]}

Palleschi, V ^{[1
]}

Pardini, L ^{[1
]}

Salvetti, A ^{[1
]}

Tognoni, E ^{[1
]}

机构：

[1] Res Area Natl Res Council, Appl Laser Spect Lab, Inst Chem Phys Proc, I-56124 Pisa, Italy

来源：

SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY | 2005年 / 60卷 / 11期

关键词：

LIBS; laser; spectroscopy; double pulse; confocal microscopy;

D O I：

10.1016/j.sab.2005.08.007

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

In this paper, the effect of laser pulse energy on double-pulse laser induced breakdown spectroscopy signal is studied. In particular, the energy of the first pulse has been changed, while the second pulse energy is held fixed. A systematic Study of the laser induced breakdown spectroscopy signal dependence on the interpulse delay is performed, and the results are compared with the ones obtained with a single laser pulse of energy cot-responding to the sum of the two pulses. At the same time, the crater formed at the target surface is studied by video-confocal microscopy, and the variation in crater dimensions is correlated to the enhancement of the laser induced breakdown spectroscopy signal. The results obtained are consistent with the interpretation of the double-pulse laser induced breakdown spectroscopy signal enhancement in terms of the changes in ambient gas pressure produced by the shock wave induced by the first laser pulse. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：1392 / 1401

页数：10

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